Two-piece welding helmet



FIG. 1 is perspective view of a first embodiment of a two-piece welding helmet showing my new design it being understood that the opposite side is a mirror image thereof;

FIG. 2 is a perspective view of a second embodiment of a two-piece welding helmet it being understood that the opposite side is a mirror image thereof; and,

FIG. 3 is a perspective view of third embodiment of a two-piece welding helmet it being understood that the opposite side is a mirror image thereof.

The surfaces or portions of the bottom and rear views of the two-piece welding helmet not shown in the drawing or described in the specification form no part of the claimed design. 

The ornamental design for a two-piece welding helmet, as shown and described. 